Hello, I'm a new member to this community. I own a 1977 27' Overlander and it has been not only a pleasure reading through the threads but I find it quite helpful to see all of the work accomplished by many passionate owners. Here is something I want to share on this. I'm an aircraft sheet metal technician and this is one of the many reason why a chose to own an AS. Here is some information that I hope helps on the repairs of this amazing hobby. Please read on and enjoy the information below.AC 43.13-1B - Acceptable Methods, Techniques, and Practices - Aircraft Inspection and Repair [Large AC. This includes Change 1.]· CHAPTER 4. METAL STRUCTURE, WELDING, AND BRAZING · CHAPTER 6. CORROSION, INSPECTION & PROTECTION · CHAPTER 7. AIRCRAFT HARDWARE SECTION 1. RIVETSThis information can be found in the FAA.GOV web site. While the AS is not an aircraft it certainly is made almost like one.Enjoy.